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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_EVENTS_OZONE_EVENT_FACTORY_OZONE_H_
#define UI_EVENTS_OZONE_EVENT_FACTORY_OZONE_H_
#include <map>
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_pump_libevent.h"
#include "ui/events/events_export.h"
#include "ui/events/ozone/event_converter_ozone.h"
namespace ui {
// Creates and dispatches |ui.Event|'s. Ozone assumes that events arrive on file
// descriptors with one |EventConverterOzone| instance for each descriptor.
// Ozone presumes that the set of file desctiprtors can vary at runtime so this
// class supports dynamically adding and removing |EventConverterOzone|
// instances as necessary.
class EVENTS_EXPORT EventFactoryOzone {
public:
EventFactoryOzone();
virtual ~EventFactoryOzone();
// Called from WindowTreeHostOzone to initialize and start processing events.
// This should create the initial set of converters, and potentially arrange
// for more converters to be created as new event sources become available.
// No events processing should happen until this is called. All processes have
// an EventFactoryOzone but not all of them should process events. In chrome,
// events are dispatched in the browser process on the UI thread.
virtual void StartProcessingEvents();
// Returns the static instance last set using SetInstance().
static EventFactoryOzone* GetInstance();
// Sets the implementation delegate. Ownership is retained by the caller.
static void SetInstance(EventFactoryOzone*);
// Add an |EventConverterOzone| instances for the given file descriptor.
// Transfers ownership of the |EventConverterOzone| to this class.
void AddEventConverter(int fd, scoped_ptr<EventConverterOzone> converter);
// Remote the |EventConverterOzone|
void RemoveEventConverter(int fd);
private:
// |EventConverterOzone| for each file descriptor.
typedef EventConverterOzone* Converter;
typedef base::MessagePumpLibevent::FileDescriptorWatcher* FDWatcher;
std::map<int, Converter> converters_;
std::map<int, FDWatcher> watchers_;
static EventFactoryOzone* impl_; // not owned
DISALLOW_COPY_AND_ASSIGN(EventFactoryOzone);
};
} // namespace ui
#endif // UI_EVENTS_OZONE_EVENT_FACTORY_OZONE_H_
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